Machine for treating and sorting can bodies



Jan. 5, 1960 w. PECHY MACHINE FOR TREATING AND SORTING CAN BODIES FiledDec. 10, 1956 3 Sheets-Sheet 1 INVENTOR.

WILLIAM PECHY BY ,6 2 A TTORNEYS Jan. 5, 1960 w. PECHY 2,91

MACHINE FOR TREATING AND SORTING 01m BODIES Filed Dec. 10, 1956 SSheetS-Sheet 2 WILLIAM PECHY BY ,ZM ZAZWU %//z dm @07 W QQZ ATTORNEYSJan. 5, 1960 w. PEC'HY 2,919,801

I MACHINE FOR TREATING AND SORTING CAN BODIES Filed Dec. 10, 1956 sSheets-Sheet :s

INVENTOR.

WILLIAM PECHY ATTORNEYS MACHINE FOR TREATING AND SORTING CAN BODIESWilliam Pechy, Belmar, N.J., assignor to American Can Company, New York,N.Y., a corporation of New Jersey Application December 10, 1956, SerialNo. 627,175

29 Claims. (Cl. 209-111) The present invention relates to a machine fortreating surfaces of can or container bodies and has particularreference to devices for feeding the bodies into treating position andfor maintaining the portion of the surfaces being treated in apredetermined position.

This is a continuation-in-part of my United States application SerialNumber 526,433 filed August 4, 1955, now abandoned, on Machine forInspecting Coating on Can Bodies.

In the manufacture of cans for various products their interior surfacesare sometimes treated as by being sprayed or coated with a suitablematerial or by other operations Fig. 7 is a sectional view takensubstantially along the line 7-7 in Fig. 6.

As a preferred or exemplary embodiment of the instant invention thedrawings disclose a machine for treating by electrically inspecting theinner coated surface of cylindri-.

cal can bodies A having open ends and moving in a substantiallycontinuous procession and arranged in timed and spaced order. The canbodies A for this purpose are advanced into a treating or inspectionstation B (Figs. 1 and 2) where their advancement is temporarilyarrested.

While at the treating or inspection station B a beam C of light (Fig. 2)from a suitable source D of lights is to protect the cans and/or theproduct. When sprayed or coated the treatment also often includesinspection for proper coverage and uniform thickness prior to shipmentof the cans. Under high speed operating conditions such treatment iseffected by rotating the cans so as to treattheir entire inner surfaces.In treating cans in this manner it has been found that very often thecans are slightly out-of-round and when rotated on their axes tend towobble. The wobbling of .the cans causes a varying treatment of theirinner surfaces and where inspection is effected by a beam of light thereflection of the beam varies and thus causes untrue readings of thecondition of the surfaces. This results in the improper rejection ofgood cans and the passing of many unsuitable cans to such an extent thatthe device becomes unreliable.

An object of the instant invention is to overcome this difficulty by theprovision of an apparatus which rotates a can body irrespective of itsaxis and simultaneously retains the portion of the can body wall beingtreated in a predetermined plane so that wobbling of out-of-round bodieshas no effect on the true treatment of the body surfaces.

Numerous other objects and advantages of the invention will be apparentas it is better understood from the following description, which, takenin connection with the accompanying drawings, discloses a preferredembodiment thereof.

Referring to the drawings:

Figure 1 is a side elevation of an apparatus embodying the instantinvention, with parts broken away;

Fig. 2 is a sectional view taken substantially along the line 2-2 inFig. 1, with parts broken away; the view also showing a wiring diagramof electrical devices used in the apparatus;

Fig. 3 is a reduced scale sectional view taken substantially along theline 33 in Fig. 2;

Fig. 4 is a schematic view illustrating principal parts of the dischargeend of the apparatus shown at the left in Fig. 1, and a wiring diagramof electrical devices used therewith;

Fig. 5 is an enlarged sectional detail taken substantially along theline 5-5 in Fig. 1, parts being broken away;

Fig. 6 is a fragmentary elevational view of principal parts of theapparatus shown at the right in Fig. 1, and illustrating a modified formof the invention; and

projected into the body at an angle so as to impinge against the innersurface as shown in Fig. 2 and to reflect or deflect out of the oppositeend of the body into a receiving device such as an electric eye orphotoelectric cell device E (Fig. 2). The beam C of light scans theentire surface of the body, the body being rotated through at least onecomplete revolution while at the inspection station, by rolling the bodyon its side wall in such a manner that the body wall as it progressivelypasses through.

the point adjacent the beam of light, remains constantly at apredetermined level or in other words remains within a predeterminedplane. In this manner any out-of-roundness of the body which causes thebody wall to wobble, i.e.'rise and fall, relative to the beam of light,is compensated for, so that the relation of the. beam of light and thewall of the rotating body, remains constant and thereby results in truereadings of the coacting condition.

An improperly coated body is detected by the light beamC reflected tothe photoelectric cell device E in the usual manner and this is utilizedto actuate a discharge mechanism which segregates the improperly coatedbodies from the properly coated bodies upon advancement of the bodiesfrom the inspection station B to a discharge station G (Fig. 1) locatedat the discharge end of the machine (at the left in Fig.1). Thesegregation and discharge of the bodies completes the cycle of operationof the machine.

The can bodies A enter the machine at one end thereof, the right asviewed in Fig. 1, in a horizontal or on-side position, by way of avertical runway 21, defined by a plurality of spaced and parallel,vertically disposed guide rails 22. At their lower ends the guide rails22 are secured to a base plate 23 having an opening therein throughwhich the can bodies pass. The plate 23 is secured to a vertical frame24 which constitutes the mainframe of the machine. Adjacent itsopenings, the base plate 23 is formed with a pair of depending endplates 26 having curved guide grooves 27 for guiding the can bodies intoposition adjacent the outer periphery of a continuously rotating starwheel 28.

The star wheel 28 is mounted on a short shaft 29 (Figs. 1 and 3)journaled in a suitable bearing formed in the frame 24. The shaft 29 isrotated by a spur gear 31 which is carried on the shaft and which mesheswith and is driven by a gear 32 mounted on a short shaft 33 journaled ina bearing in the frame 24. The gear 32 meshes with and is driven by agear 34 mounted on a short shaft 35 journaled in a bearing in the frame24 and this gear 34 meshes with and is driven by a main driving gear 36.The gear 36 is mounted on a main driving shaft '37 (see also Fig. 2)which is journaled in a bearing 38 in the frame 24. The main drivingshaft 37 is rotated continuously in any suitable manner.

The star wheel 28 preferably is formed with a plurality of peripheralprongs 41 and adjacent pockets 42 for propelling can bodies Aindividually and intimed and spaced order along a curved path of traveldownwardly under the outer periphery of the wheel. A pair of spaced andparallel curved guide rails 43 disposed adjacent the periphery of thewheel and forming continudata-e01 3 ations of the guide grooves 27 inthe slide plates 26, retain the can bodies A in the star wheel pockets42. These guide rails 43 are formed with lugs 44 secured to the frame24.

The prongs 41 of the star wheel 28 deliver the can bodies individuallyto a transfer station H (Fi 1) which is adjacent the outer periphery ofa continuously rotating carrier turret 46. The carrier turret 46 ismounted on and rotates with the main driving shaft 37 (see Fig. 2). Thiscarrier turret 46 is formed with a pair of spaced and parallel disc-likeflanges 47 having the major portions the outer peripheries concentricwtih the axis of the driving shaft 37 and of equal radii so as toprovide a wide support for and to retain a can body received on theflanges in a position parallel to the axis of the turret 46. At spacedintervals around the peripheries of the flanges 47, they are formed withpockets 48, each of which is provided adjacent its following edge withan outwardly, radially projecting lug or protuberance 49. Four of thesepockets 4-8 and lugs 49 are shown in the drawings.

The carrier turret 46 is rotated in time with the star wheel 23 with theouter concentric peripheral portions of the turret in substantiallytangential relation to the path of travel of the can bodies A at thetransfer station H. The star wheel 28 advances a can body into thetransfer station Hand substantially into engagement with a concentricportion of the outer periphery of the carrier turret 46 just behind orin back of a lug 49 as shown at the left in Fig. 1. In this initialrelation of a can body A with the carrier turret 46 a propelling finger52 carried on the carrier turret 46 engages behind the can body anda'dvaneesthe' body with the turret. A pair of spaced and parallel'curvedguide rails 53 secured to the frame 24 and extending around the upperportion of the path of travel of the'peripher'y of the turret 46, retainthe can body in engagement with'the periphery of the turret.

There are four propelling" fingers 52, one for each con centric portionor'face 54 of the turret flanges 47, be-' tween the lugs 49. Thesefingers 52 are disposed bepins 55 (Figs. 1 and 2) carried in the turretflanges. One pins (Figs. 1 and 2) carried in the turret flanges. One endof each pivot pin 55 extends beyond the flanges 47 and carries'a camlever 56 which on its free end carries a cam roller 57 which operates ina cam groove 58 of a stationary face cam 59 which surrounds the maindriving shaft bearing 38 and is secured to the frame 24.

When a propelling finger 52 picks up a can body A at the transferstation H it takes the body away from the star wheel 28 and advances itwith the carrier turret 46 along the curved guide rails 53 in a closerelation to the lug 4% located just ahead of the can body as shown inFig. I. The propelling finger 52 remains in propelling contact with theadvancing can body A until the body reaches the treating or inspectionstation B. At the treating or inspection station the finger 52 pushesthe can body into engagement with a stationary stop comprising a freelyrotatable roller 62 (Fig. l) mounted on a pivot pin 63 carried in abracket 64 secured to the frame 24.

When the body engages against the stop roller 62, the propelling finger52 rocks back away from the body to a position within the outerperipheral faces of the turret flanges 47, for clearance passage underthe body so as to leave the body at the treating or inspectionstation Bwhile the turret 4'6 continues to rotate. This rocking of the propellingfinger 52 is effected by the traversing of the cam groove 58 by the camroller 57.

As soon as the can body engages against the stop roller 62 at thetreating or inspection station B, it is pressed downwardly against theouter peripheral faces 54 of the carrier turret flanges 47 by a pair ofspaced and parallel freely rotatable pressure rollers 66 (Figs. 1 and 2)which are normally disposed above and clear of the path of travel ofthecan bodies but. which are movable simultaneously into engagement withthe side wall of a body positioned at the treating or inspection stationE. The rollers 66 engage the body at widely spaced points to retain thebody parallel to the axis of the turret and to prevent tilting of thebody on the turret faces 54.

These pressure rollers 66 are carried on a free end of an arm 67 mountedon a pivot shaft 68 in a bearing 69 formed in the frame 24. The pivotshaft 68 also carries a cam lever 71 (Figs. 2 and 3) having a cam roller72 which operates in a cam groove 73 of a rotatable face cam 74 formedintergrally with the main driving gear 3'6. The cam 74 rocks the camlever 71 and arm 67 toward and away from the peripheral faces 54 of theturret flanges 47 in time with the entrance of the can bodies into theinspection station B.

When the pressure rollers 66 move down onto the side wall of a can bodyA, located at the treating or inspection station B, and are held againstadvancement by the stop roller 62, they press the body wall firmlyagainst the peripheral flanges 47 of the carrier turret 46 to producesufficient frictional engagement between the flange faces 54 and thebody wall to cause the body to rotate; while remaining in apredetermined position, with a three point engagement with the stoproller 62, the pressure rollers 66 and the turret flange faces 54. Inthis positiontlie body does not rotate on its own axis buton the wall ofthe body with a rolling action that keeps the body wall always inengagement with the outer faces of the turret flanges 47. Since theflange faces'54 are' c'orn centric with the axis of the turret 46, thebody wall at its point of contact with the flange face always remains inthe same plane regardless of the degree of out-oh roundness of the body.Hence thebody wallat its po'int of contact with the'flange faces 54 isprevented firom rising or lowering.

While the can body A is rotating in" this position at the treating orinspection station-B the beam 0 of light is projected into the bodyagainst its inside coated surface at the point of contact between thebody wall and the flange faces to inspect the coating as he're'inbefo'tementioned. Since the body is rotated through at least one fullrevolution to completely scan the entire inside'surface of the body, thelength of the peripheral face '54 of each turret flange 47, between aturret lug 49 and a following pocket 48, is made to correspond to alength slightly in excess of the circumference of a can body.

At the termination of the treatment or inspection of the body A, i.e.when the turret 46 has rotated sufficiently to carry the pocket 48 atthe end of the peripheral faces'of the flanges 47 into the inspectionstation B, the body rolls off the flange faces and drops into thepocket; the adjacent lugs 49 serving to facilitate this movement of thebody. The body disposed in the pocket 48 is below the stop roller 62.Hence the turret 46, as it continues to rotate, removes the inspectedbody from the treating or inspection station B and advances itunder thestop roller 62 along the curved guide rail 53, still in the turretpocket and propelled by the adjacent lugs 49, to a discharge wheel 76(Fig. l) disposed adjacent the carrier turret 46. Immediately uponremoval of the treated or inspected can body from the treating orinspection station B, the pressure rollers 66 are lifted, by the facecam 74, clear of the path of travel of the can bodies to) permit thenext following incoming body to enter the inspection station B withoutinterference.

The discharge wheel 76 is mounted on'a continuously rotating shaft 77(Figs. 1 and 3) which is 'journaled in a bearing in the frame 24 andwhich carries a driving gear 78 (Fig. 3). The gear 78 meshes with and isdriven by a gear 79 mounted on a short shaft 81 journaled in a bearingin the frame'24. The gear 79 in turn meshes with and is driven by a gear83 mouhted on a short shaft 84 journaled in a bearing in the frame 24.This gear 33 meshes with andis driven by the main driving gear 36.Through this gear train the discharge wheel 76 is rotated in the properdirection in time with the carrier turret 46.

The discharge wheel 76 is provided with three equally spaced peripheralpockets 85 (Fig. 1) formed in electromagnets 86 disposed in recesses 87in the wheel. These pockets 85 rotate into register with the turretpockets 48 during the synchronized rotation of the wheel and the turret46. Each magnet 86 is provided with a pair of projecting brushes 91which engage against and ride along a pair of spaced and parallel curvedelectric contact strips 92 (see also Fig. 4) which are disposed adjacentthe path of travel of the brushes 91 for a predetermined distanceextending along an arc of substantially ninety degrees from a pointimmediately ahead of the point where the wheel and turret pockets 85, 48rotate into register. These strips 92 are secured to an insulating plate90 which is secured to the frame 24. One of the contact strips 92 isconnected by a wire 94 (Fig. 4) to a source of electric current such asa generator 95. The other contact strip 92 is connected by a wire 96 toa normally closed electric switch 97 which is also connected by -a wire98 to the generator 95. This normally closed circuit keeps the contactstrips 92 energized.

Hence as a magnet 87 rotates into position adjacent the carrier turret46, the magnet brushes 91 engage the contact strips 92 and thus energizethe magnet. The magnet remains energized until it rotates with thedischarge wheel 76 to a position where the brushes ride off the contactstrips. The magnets thereupon become deenergized. These magnets 87 areutilized to segregate properly coated from improperly coated can bodiesA as treated or inspected by the beam C of light.

For properly coated can bodies the beam C of light impinging against theinside coated surface of the rotating body at the inspection station B,is deflected out of the body onto the photoelectric cell device E ashereinbefore explained. The cell device E is connected into a normallyclosed electric circuit which receives electric current from a suitablesource such as a generator 101 (Fig. 2). The generator 101 is connectedby wires 102, 103 to a conventional amplifying unit 104 and the unit inturn is connected by wires 105, 106 to the photoelectric cell device E.The generator 101, through connecting wires 108, 109 also suppliescurrent to the source D of light.

When the photoelectric cell device E receives the full intensity of thedeflected light beam C, as it does for properly coated can bodies A, thecircuit remains closed and the inspected can body after leaving theinspection station B is picked up by an energized magnet 86 on'thedischarge wheel 76 when the pocket 85 of the wheel and the pocket 43 ofthe carrier turret 46 rotate into register. The can body clings to theenergized magnet 86 and is thus removed from the carrier turret pocket48 as the wheel pocket and turret pocket rotate out of register. Theproperly coated can body thus is carried by the discharge wheel 76 to aposition where the magnet brushes 91 ride off the contact strips 92. Atthis position the magnet becomes deenergized and the can body thereuponis released and falls away from the discharge wheel. The falling canbody is received in a good can body chute 111 which is disposed underthe discharge wheel 76 and which directs the body rolling on its sidewall, to a suitable place of deposit for properly coated or good bodies.I

If, upon inspection, the coating of the can body at the inspectionstation B is found to have imperfections, the beam C of light deflectedfrom the coated surface is reduced in intensity or is deflected at anangle away from the photoelectric cell device E and hence the celldevice does not receive the deflected beam at all or receives it only ata reduced intensity. This action on the cell device E deenergizes theconnecting electric circuit and sets in motion an indexing mechanismwhich op- I erates to prevent energization of a discharge magnet 86 forsuch an improperly coated body and thus prevents this body from beingdischarged into the good body chute 111. For this purpose the machine isequipped with a time delay or indexing device which is set by thephotoelectric cell device E at the inspection station B and operates totemporarily open the electric switch 97 at the discharge station tobreak the discharge magnet circuit and thereby prevent the passingmagnet 86 from being energized.

With the magnet 86 deenergized, it fails to pick up the improperlycoated can body from the carrier turret 46. The body thus remains in itsturret pocket 48 and is carried past the good can chute 111 and is sweptoff into an improperly coated can body chute 112 (Fig. 1) disposedimmediately below the chute 111. The chute 112 directs the improperlycoated can body, rolling on its side wall, to any suitable place ofdeposit.

The indexing device which prevents energization of a magnet 86 comprisesin part a plurality of slideable indexing pins 115 (Figs. 1, 2, 4 and 5)which are carried in bores 116, 117 (Fig. 5) formed in and extendingtransversely of the carrier turret flanges 47 and in blocks 118 disposedbetween the flanges. There is one pin 115 and one block 118 for eachpocket 48 in the turret 46. The pins 115 are longer than the width ofthe carrier turret 46 so that one end projects beyond one or the otherside of the turret. In their normal positions the pins project beyondthe turret on the right as viewed in Fig. 2. When an improperly coatedcan body is detected by the photoelectric cell device E, the pin 115corresponding to the pocket 48 in which the body is located, is pushedtoward the left (Fig. 2) to the position shown in Fig. 5. The pins arelocked in their normal and displaced positions by a spring detent 121(Fig. 5) which engages in lockingv grooves 122, 123 formed in the pins.

Movement of a pin 115 from its normal position to a displaced positionpreferably is effected by a pusher plate 125 (Figs. 1 and 2) which isdisposed near the inspection station B and adjacent the path of travelof the pins 115. The pusher plate 125 is mounted on a movable.

core 126 of an electric solenoid 127 connected by wires 128, 129 to theamplifying unit 104. The solenoid 127 is normally energized to hold thepusher plate 125 in a retracted position as shown in Fig. 2, against theresistance of a compression spring 131 coiled around the core 126between the plate and the solenoid. When the photoelectric cell devicecircuit is deenergized by detection of an improperly coated can body A,the solenoid 127 is also deenergized and the spring pushes the plate 125against the end of a passing pin 115 and thereby pushes the pin from itsnormal position to the displaced position shown in Fig. 5.

When the improperly coated can body reaches the discharge wheel 76, thedisplaced indexing pin 115 engages and pushes laterally a breaker shoe133 (Figs. 1 and 4) disposed between the electric switch 97 and thecarrier turret 46 adjacent the discharge station. The shoe 133 ismounted on a pair of studs 134 (Fig. 4) yieldably carried in a bracket135 attached to the frame 24. Springs 136 interposed between the bracketand the shoe 133 provide for the yieldability of the shoe. The shoe 133engages against a movable element 137 of the switch 97.

Hencewhen the shoe 133 is actuated by the displaced indexing pin 115, itopens the switch97 through pressure on the movable element 137 andthereby breaks the magnet circuit to prevent energization of the magnet86 corresponding to the turret pocket 48 which carries the improperlycoated can body, to thus effect discharge of this body into the properchute 112 as explained above. The displaced indexing pin 115 rides alongthe shoe 133 and thus holds the magnet deenergized until the can body isout of its range of attraction.

After performing its function, the displaced indexing pin 115 is reset,i.e., returned to its normal position for a repeat operation whenrequired, by a stationary reset cam 139 (Figs. 1 and 2) which is formedon and projects placed'pin 115 engages against this cam 139 and ispushed back into normal position as the pin passes the cam duringrotation of the carrier turret 46. This completes the cycle of operationof the machine.

In a modified form of the invention, permanent magnets 145, 146 (Figs. 6and 7) are utilized on the carrier turret 46 instead of the propellingfingers 52. These magnets 145, 146 are disposed between the turretflanges 47 adjacent their outer peripheries as shown in Fig. 7. Themagnets 145 are located adjacent the pocket projections 49 and flushwith the peripheral faces 54 of the flanges 47 so as to pick up anentering can body from the transfer wheel 28 and hold it against theback of the lug 49 until it reaches the treating or inspection stationB. At this treating or inspection station the stop roller 62 strips thecan body away from the magnet and thus permits the body to roll on theperipheral faces 54 of the turret flanges 47.

The magnets 146 are located in the carrier turret pockets 4-8 andfunction to hold the treated or inspected can bodies in these pockets asthey advance from the treating or inspection station B to the dischargestation. These magnets 146 are of less strength than the dischargemagnets 86 so that the discharge magnets can remove properly coated canbodies from the carrier turret pockets 43 when the discharge and turretpockets rotate into register for the discharge of the can bodies ashereinbefore explained in the preferred form of the invention. When animproperly coated can body is carried in a turret pocket 48, the magnet146 holds the body in the pocket until it reaches and is stripped awayfrom the magnet by the improperly coated can body discharge chute 112.

It is thought that the invention and many of its attendant advantageswill be understood from the foregoing description, and it will beapparent that various changes may be made in the form, construction andarrangement of the parts without departing from the spirit and scope ofthe invention or sacrificing all of its material advantages, the formhereinbefore described being merely a preferred embodiment thereof.

I claim:

1. In a machine for progressively inspecting for imperfections theinteriorly coated surfaces of cylindrical container bodies, thecombination of a rotatable turret having a peripheral face of which atleast a portion is concentric with the axis of said turret, actuatingmeans for rotating said turret on its axis, means for carrying acontainer body on its side wall on said concentric portion of said faceinto an inspection station, means at said inspection station for holdingand pressing said container body against said concentric portion of saidface in a predetermined position to effect rotation of said body at saidstation through continued rotation of said turret to maintain andprogressively pass the body side wall through a plane tangential to saidconcentric portion of said face at said station, inspecting means atsaid station for inspecting the interior surface of said rotatingcontainer body, and a clearance recess in said con centric portion ofsaid face of said turret for receiving said container body at thetermination of said inspection to remove said body from said station.

2'. in a machine for progressively inspecting for imperfections theinteriorly coated surfaces of cylindricai container bodies, thecombination of a rotatable turret having a peripheral face of which atleast a portion is concentric with the axis of said turret, actuatingmeans for rotating said turret on its axis, holding means for releasablyholding a container body on its side wall on said concentric portion ofsaid face and for advancing said body with said rotating turret into aninspection station, stop means at said inspection station for stoppingsaid container body in a predetermined position temporarily irrespectiveof continu d rotation of said turret, pressure means also at saidstation for pressing said 8 container body against said concentricportion of said face and against said stop means to effect rotation ofsaid container body at said station through continued rotation of saidturret to maintain and progressively pass the body side wall through aplane tangential to said concentric portion of said face at saidstation, inspecting means at said station for inspecting the interiorsurface of said rotating container body, and a clearance recess in saidconcentric portion of said face of said turret for receiving saidcontainer body at the termination of said inspection to pass saidinspected body under said stop means to remove said body from saidstation.

3. A machine of the character defined in claim 1 wherein said means forcarrying said body on said concentric portion of said face is astationary guide rail disposed adjacent the outer periphery of saidturret for retaining said body against displacement from said turretface and a finger mounted on and movable with said' turret and engagingbehind said body for advancing said body with said turret.

4. A machine of the character defined in claim 3' wherein said finger ispivotally mounted on said turret and wherein there is provided cam meansfor pivoting said finger away fro-m said body at said inspection stationto leave said body at said station.

5. A machine of the character defined in claim 1 wherein said bodyholding means at said inspection station is'a freely rotatable stoproller disposed adjacent the periphery of said turret in the path oftravel of said container body and mounted in a fixed position to act asa stop element.

6. A machine of the character defined in claim 1' wherein said bodypressing means at said inspectionstation is a movable pressure elementdisposed adjacent the periphery of said turret above the path of travelof said container body and mounted on a movable lever arm and whereincam means are provided for actuating said lever arm to press saidpressure element against said body at said inspection station tofrictionally engage the side Wall of said body against said stop rollerand said concentric portion of the peripheral face of said turret.

7. A machine of the character defined in claim 6 wherein said pressureelement is a pair of spaced and parallel freely rotatable pressurerollers engageable against the side wall of said body at Widely spacedpoints to retain said body against tilting.

8. A machine of the character defined in claim I wherein said turret isprovided with a pair of spaced and parallel peripheral flanges andwherein said concentric portions of said face are formed in theperipheries of said fianges to provide a wide support for said body toretain said body in a position parallel to the axis of said turret.

9. A machine of the character defined in claim 1 wherein said clearancerecess in said turret face is a pocket for receiving said body at saidinspection station and wherein said concentric portion of said turretface is provided with a radial projection disposed adjacent thefollowing edge of said pocket to facilitate removal of said body fromsaid station and to propel said body in said pocket with said turretbeyond said station.

10. A machine of the character defined in claim 1 wherein said turret isprovided with a plurality of circumferentially spaced concentricportions of said periph: eral face and wherein each of said concentricportions is formed with a pocket and an adjacent radial projection forreceiving an inspected container body from said inspection station andfor propelling said body with said turret.

11. A machine of the character defined in claim 10 wherein there isprovided a guide rail disposed adjacent the periphery of said turret forretaining said inspected bodies in said turret pockets.

12. A machine of the character defined in claim '10 whe'rein there isprovideda star wheel disposed adjacent 'said turret for feedingsaidbodies individually to said concentric portions of said turret faceat a point adjacent and following said radial projections to leave theremainder of said concentric portions for rotation of said bodies atsaid inspection station, and wherein means are provided for rotatingsaid turret and said star wheel in synchronism for said feedingoperation.

13. A machine of the character defined in claim wherein said means forcarrying a container body on said turret is a finger mounted on saidturret and wherein each of said concentric face portions is providedwith one of said fingers, said fingers being disposed adjacent and inspaced relation to said radial projections for retaining a received bodyin pisition adjacent a said projection for travel with said turret tosaid inspection station.

14. A machine of the character defined in claim 10 wherein magnet meansare disposed in said turret pockets and in said concentric face portionsadjacent said radial projections to retain uninspected bodies in placeon said faces and to retain inspected bodies in place in said pockets.

15. A machine of the character defined in claim 1 wherein saidinspecting means is a beam of light and wherein means are provided forprojecting said beam into said body at an angle thereto and whereinmeans are provided for receiving the deflected portion of said beam oflight and therethrough indicating the detection of an improperly coatedcontainer body. 16. A machine of the character defined in claim whereinsaid means for indicating the detection of an improperly coated bodyincludes electromagnet means disposed beyond said inspection station andadjacent the periphery of said turret for picking up container bodiesfrom said turret, an'electric circuit connecting with saidelectromagnets for normally energizing them, a time delay deviceoperable by said deflected light beam for an improperly coated body andoperable against said electric circuit to break said circuit forimproperly coated body, whereby said electromagnets are deenergized andsaid bodies remain on said turret, and means for stripping such bodiesoif said turret and for segregating them from the bodies removed by saidelectromagnets.

17. A machine of the character defined in claim 16 wherein saidelectromagnets are supported in a discharge wheel disposed adjacent saidturret beyond said inspection station and wherein means are provided forrotating said wheel and said turret in synchronism to effect thetransfer of said bodies to said wheel.

18. In a machine for treating surfaces of cylindrical container bodies,the combination of a rotatable turret having a peripheral face of whichat least a portion is concentric with the axis of said turret, actuatingmeans for rotating said turret on its axis, means for carrying acontainer body on its side Wall on said concentric portion of said faceinto a treating station, means at said treating station for holding andpressing said container body against said concentric portion of saidface in a predetermined position to effect rotation of said body at saidstation through continued rotation of said turret to maintain andprogressively pass the body side Wall through a plane tangential to saidconcentric portion of said face at said station, treating means at saidstation for treating a surface of said rotating container body, and aclearance recess in said concentric portion of said face of said turretfor receiving said container body at the termination of said treatmentto remove said body from said station. v

19. In a machine for treating surfaces of cylindrical container bodies,the combination of a rotatable turret having a peripheral face of whichat least a portion is concentric with the axis of said turret, actuatingmeans for rotating said turret on its axis, holding means for releasablyholding a container body on its side wall on said concentric portion ofsaid face and for advancing said body with said rotating turret into atreating station, stop means at said treating station for stopping saidcontainer body in a predetermined position irrespective of continuedrotation of said turret, pressure means also at said treating stationfor pressing said container body against said concentric portion of saidface and against said stop means to effect rotation of said containerbody at said station through continued rotation of said turret tomaintain and progressively pass the body side wall through a planetangential to said concentric portion of said face at said station,treating means at said station for treating a surface of said rotatingcontainer body, and a clearance recess in said concentric portion ofsaid face of said turret for receiving said container body' at thetermination of said treatment to pass said treated body under said stopmeans to remove said body from said station.

20. A machine of the character defined in claim 18.

wherein said means for carrying said body on said concentric portion ofsaid face is a stationary guide rail disposed adjacent the outerperiphery of said turret for retaining said body against displacementfrom said turret face and a finger mounted on and movable with saidturret and engagnig behind said body for advancing said body with saidturret.

21. A machine of the character defined in claim 20 wherein said fingeris pivotally mounted on said turret and wherein there is provided cammeans for pivoting said finger away from said body at said treatingstation to leave said body at said station.

22. A machine of the character defined in claim 18 wherein saidclearance recess in said turret face is a pocket for receiving said bodyat said treating station and wherein said concentric portion of saidturret face is provided with a radial projection dispozed adjacent thefollowing edge of said pocket to facilitate removal of said body fromsaid station and to propel said body in said pocket with said turretbeyond said station.

23. A machine of the character defined in claim 18 wherein said turretis provided with a plurality of circumferentially spaced concentricportions of said peripheral face and wherein each of said concentricportions is formed with a pocket and an adjacent radial projection forreceiving a treated container body from said treating station and forpropelling said body with said turret.

24. A machine of the character defined in claim 23 wherein magnet meansare disposed in said turret pockets and in said concentric face portionsadjacent said radial projections to retain untreated bodies in place onsaid faces and to retain treated bodies in place in said pockets.

25. In a machine for treating container bodies, the combination of arotatable turret, actuating means for constantly rotating said turret onits axis, propelling means mounted on and movable with said turret forreleasably retaining a container body in a predetermined position onsaid turret while the turret advances said body into a treating station,holding means at said station for holding said body against advancementwith said rotating turret for treatment, and removing means on saidturret and spaced from said propelling means for receiving said body atthe termination of said treatment to pick up and remove said body fromsaid station.

26. In a machine for treating container bodies, the combination of arotatable turret, actuating means for constantly rotating said turret onits axis, a finger mounted on and movable with said turret for engagingbehind a container body on said turret and advancing it into a treatingstation, holding means at said station for bolding said body againstadvancement with said rotating turret for treatment, and removing meanson said turret and spaced from said finger for receiving said body atthe termination of said treatment to pick up and remove said body fromsaid station.

27. In a machine for treating container bodies, the

combination of a rotatable turret, actuating means for constantlyrotating said turret on its axis, a finger pivotally mounted on andmovable with said turret for engaging behind a container body on saidturret and advancing it into a treating station, holding means at saidstation for holding said body against advancement with said rotatingturret for treatment, cam means for pivoting said finger away from saidbody at said treating station to leave said body at said station underthe control of said holding means, and removing means on said turret andspaced from said finger receiving said body at the termination of saidtreatment to pick up and remove said body from said station.

28. In a machine for treating container bodies, the combination of arotatable turret, actuating means for constantly rotating said turret onits axis, carrying means mounted on said turret for carrying a containerbody on said turret into a treating station, holding means at saidstation for holding said body against advancement with said rotatingturret for treatment, said turret being 20 formed with a clearancerecess in the periphery thereof and spaced from said carrying means forreceiving said 12 body at the termination of said treatment, andraradial projection disposed adjacent the following edge oft'said recessto propel said body in said recess with. the turret beyond said station.

29. In a machine for treating container bodies, the combination of arotatable turret, actuating means for constantly rotating said turret onits axis, magnetiode vices mounted on and movable with said turret forat trading and retaining a container body on saidturret and foradvancing it into a treating station, holding means at said station forholding said body against advancement with said rotating turret fortreatment, and removing means on said turret and spaced from said"magnetic devices for receiving'said body at the termination of saidtreatment to pick up and remove said body from said station.

References Cited in-thefile of thispatent UNITED STATES PATENTS2,809,639 Edwards Oct. 15, 1951"

